Diagnosis Procedure

1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC P0344-00 being the only current DTC on the CONSULT screen.

Is DTC P0344-00 detected as the only current DTC?

YES

GO TO 2 .

NO

Refer to DTC Index .

1. Turn ignition switch OFF.
2. Inspect the engine and vehicle grounding:
   • Check all engine block, starter, generator, chassis, and battery grounds.
   • Verify all grounds are present and properly grounded.
   • Verify all connections are free of corrosion and tight.

Is the inspection result normal?

YES

GO TO 3 .

NO

Repair or replace error-detected parts.

1. Turn ignition switch OFF.
2. Inspect the crankshaft sensors for damage.

Is the inspection result normal?

YES

GO TO 4 .

NO

Replace crankshaft position sensor. Refer to Removal and Installation .

1. Turn ignition switch OFF.
2. Inspect the crankshaft tone wheel for:
   • Missing or bent teeth
   • Cracks
   • Damaged surfaces

Is the inspection result normal?

YES

GO TO 5 .

NO

Replace crankshaft tone wheel. Refer to Removal and Installation or Removal and Installation .

1. Turn ignition switch OFF.
2. Inspect the camshaft position sensor for damage.

Is the inspection result normal?

YES

GO TO 6 .

NO

Replace camshaft position sensor. Refer to Removal and Installation .

1. Turn ignition switch OFF.
2. Inspect the camshaft gears for:
   • Excessive wear
   • Fretting
   • Damaged surfaces

Is the inspection result normal?

YES

GO TO 7 .

NO

Replace camshaft gears. Refer to Removal and Installation .

1. Turn ignition switch OFF.
2. Remove the valve covers.
3. Rotate the engine to top dead center (TDC) for the number 1 cylinder. Verify the camshaft gear timing marks are properly aligned.
4. Inspect the timing.

Is the inspection result normal?

YES

GO TO 8 .

NO

• Remove and install the camshaft to properly align timing marks at TDC.
• GO TO 8 .

1. Connect all components.
2. With CONSULT, erase all DTCs.
3. Operate the engine within the conditions for setting DTC found in the DTC description.
4. Check for existing "ENGINE" diagnostic trouble codes.

Did the P0344-00 DTC return?

YES

Troubleshooting procedure needs to be repeated. Go to DTC Description .

NO

Repair complete.